[gcc r16-4502] libstdc++: Remove undeclared macros from configure.ac [PR122322]

[Jonathan Wakely]

https://gcc.gnu.org/g:f5fb192c65e618508108525252b771956bdb1078

commit r16-4502-gf5fb192c65e618508108525252b771956bdb1078
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Sat Oct 18 22:05:43 2025 +0100

    libstdc++: Remove undeclared macros from configure.ac [PR122322]
    
    The additions inr16-4443-g651bf5126da124 cause errors when running
    autoreconf.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/122322
            * configure.ac (with_newlib) <*-rtems*>: Remove
            HAVE_SYS_IOCT4YL_H, _GLIBCXX_USE_LINK, _GLIBCXX_USE_READLINK,
            _GLIBCXX_USE_SYMLINK, _GLIBCXX_USE_TRUNCATE, and
            _GLIBCXX_USE_FDOPENDIR. Remove duplicates.
            * configure: Regenerate.

Diff:
---
 libstdc++-v3/configure    | 22 +---------------------
 libstdc++-v3/configure.ac | 10 ----------
 2 files changed, 1 insertion(+), 31 deletions(-)

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 42b638f09fcb..5302780be00a 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -28744,14 +28744,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
         $as_echo "#define HAVE_LINK 1" >>confdefs.h
 
-        $as_echo "#define HAVE_SYS_IOCT4YL_H 1" >>confdefs.h
-
         $as_echo "#define HAVE_SYS_STAT_H 1" >>confdefs.h
 
         $as_echo "#define HAVE_SYS_TYPES_H 1" >>confdefs.h
 
-        $as_echo "#define HAVE_S_ISREG 1" >>confdefs.h
-
         $as_echo "#define HAVE_QUICK_EXIT 1" >>confdefs.h
 
         $as_echo "#define HAVE_READLINK 1" >>confdefs.h
@@ -28766,12 +28762,6 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
         $as_echo "#define HAVE_SYMLINK 1" >>confdefs.h
 
-        $as_echo "#define HAVE_SYS_IOCT4YL_H 1" >>confdefs.h
-
-        $as_echo "#define HAVE_SYS_STAT_H 1" >>confdefs.h
-
-        $as_echo "#define HAVE_SYS_TYPES_H 1" >>confdefs.h
-
         $as_echo "#define HAVE_S_ISREG 1" >>confdefs.h
 
         $as_echo "#define HAVE_TRUNCATE 1" >>confdefs.h
@@ -28792,16 +28782,6 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
         $as_echo "#define _GLIBCXX_USE_UTIME 1" >>confdefs.h
 
-        $as_echo "#define _GLIBCXX_USE_LINK 1" >>confdefs.h
-
-        $as_echo "#define _GLIBCXX_USE_READLINK 1" >>confdefs.h
-
-        $as_echo "#define _GLIBCXX_USE_SYMLINK 1" >>confdefs.h
-
-        $as_echo "#define _GLIBCXX_USE_TRUNCATE 1" >>confdefs.h
-
-        $as_echo "#define _GLIBCXX_USE_FDOPENDIR 1" >>confdefs.h
-
         $as_echo "#define HAVE_USLEEP 1" >>confdefs.h
 
 
@@ -53961,7 +53941,7 @@ $as_echo "$glibcxx_cv_libbacktrace_atomics" >&6; }
     CXXFLAGS='-O0 -S'
 
     cat > conftest.$ac_ext << EOF
-#line 53964 "configure"
+#line 53944 "configure"
 #include <stddef.h>
 int main()
 {
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index b9d49c3e4364..339e7bb17a4d 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -399,10 +399,8 @@ dnl # rather than hardcoding that information.
         AC_DEFINE(HAVE_ALIGNED_ALLOC)
         AC_DEFINE(HAVE_AT_QUICK_EXIT)
         AC_DEFINE(HAVE_LINK)
-        AC_DEFINE(HAVE_SYS_IOCT4YL_H)
         AC_DEFINE(HAVE_SYS_STAT_H)
         AC_DEFINE(HAVE_SYS_TYPES_H)
-        AC_DEFINE(HAVE_S_ISREG)
         AC_DEFINE(HAVE_QUICK_EXIT)
         AC_DEFINE(HAVE_READLINK)
         AC_DEFINE(HAVE_SETENV)
@@ -410,9 +408,6 @@ dnl # rather than hardcoding that information.
         AC_DEFINE(HAVE_SOCKATMARK)
         AC_DEFINE(HAVE_STRERROR_L)
         AC_DEFINE(HAVE_SYMLINK)
-        AC_DEFINE(HAVE_SYS_IOCT4YL_H)
-        AC_DEFINE(HAVE_SYS_STAT_H)
-        AC_DEFINE(HAVE_SYS_TYPES_H)
         AC_DEFINE(HAVE_S_ISREG)
         AC_DEFINE(HAVE_TRUNCATE)
         AC_DEFINE(HAVE_UNISTD_H)
@@ -423,11 +418,6 @@ dnl # rather than hardcoding that information.
         AC_DEFINE(_GLIBCXX_USE_CHDIR)
         AC_DEFINE(_GLIBCXX_USE_GETCWD)
         AC_DEFINE(_GLIBCXX_USE_UTIME)
-        AC_DEFINE(_GLIBCXX_USE_LINK)
-        AC_DEFINE(_GLIBCXX_USE_READLINK)
-        AC_DEFINE(_GLIBCXX_USE_SYMLINK)
-        AC_DEFINE(_GLIBCXX_USE_TRUNCATE)
-        AC_DEFINE(_GLIBCXX_USE_FDOPENDIR)
         AC_DEFINE(HAVE_USLEEP)
 
         # These functions are defined in librtemscpu.  We don't use